@Tutanota I agree with most points in this post, but the privacy section seems slightly incomplete to me. Using identity wallets which use zero knowledge proofs (e.g. @yivi_privacybydesign), proving ‘being over 16’ can be done without one’s ID or any other PIID with a central server.
The point of being limited to governmental ID holders still mostly holds up though (although it shifts to e.g. EUDI wallet holders, which happen to not necessarily use zero knowledge proofs)